The article talks about Tresor, a club which opened its doors in May 2007 in Berlin, Germany. Hidden in the vault of a former department store, overshadowed by the cranes of the rapidly growing Potsdamer Platz, the club was Berlin's first and most important techno venue. The new club, housed in a mammoth industrial cathedral of a space in a former power station, throws parties Wednesdays, Fridays and Saturdays.